01windows窗体程序学习

 静态用户名和密码的登录练习

 private void button2_Click(object sender, EventArgs e)
 {

 textUser.Text = Convert.ToString(textUser.Text);
 textBox2.Text = textBox2.Text.ToString();
 if (textUser.Text == "admin" && textBox2.Text == "")
 {
 MessageBox.Show("登录成功");
 }
 else
 {
 MessageBox.Show("用户名或密码错误");
 }

 }

 窗体关闭消息提示的练习

 private void Form2_FormClosing(object sender, FormClosingEventArgs e)
 {
 DialogResult re = MessageBox.Show("确定关闭？","消息",MessageBoxButtons.YesNo);//是否关闭消息提示框
 if (re == DialogResult.No)
 {
 e.Cancel = true; //关闭
 }
 else
 {
 e.Cancel = false; //不关闭
 }
 }